The team believes it is a better club with Sanchez playing first base in the big leagues on a regular basis.
But with Sanchez scuffling with a .197 batting average to go with one home run and 11 RBIs, the team on Saturday decided to option the 28-year-old to New Orleans.
Barring a disabled list stint, a player must spend at least 10 days down before being eligible for a callup.
Manager Ozzie Guillen said on Sunday, that the organization would like to see Sanchez get back into his groove and then rejoin the club in less than two weeks.
"Hopefully, he gets his stuff together and he gets back here," Guillen said. "I talked to him last night. I said, 'We need you here. This ballclub was built with you in the lineup every day.' I will be waiting for him. This is not a punishment."
Sanchez was an All-Star in 2011, in a season he appeared in 159 games.
But he's had a hard time finding consistency in his 122 at-bats this year.
"We've been talking about this for a little while," Guillen said of sending the first baseman down. "I think Gaby got to the point where he needed to relax a little bit. It got to the point where he tried to help us so much. It was a very tough situation.
"I think he was trying too hard. He was rushing. He was trying to come out of the slump with one at-bat."